1、小升初专项复习小升初专项复习数词数词数数词词1.基数词基数词2.序数词序数词3.数词的应用数词的应用 基数词基数词1112的基数词是独立的单词。one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve 21319的基数词以-teen结尾。但13,15,18较特殊,13 thirteen 15 fifteen 18 eighteen 32090的整十位均以-ty结尾。20,30,40,50,80,较特殊,20 twenty 30thirty 40forty 50fifty 80eighty 90ninety 4十位数与个位数之间
2、要加连字符号“-”。28twenty-eight,96ninety-six 5百位和十位(若无十位则和个位)之间加and,148one hundred and forty-eight 406four hundred and six 6hundred(百),thousand(千),million (百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s。600six hundred,8百万eight million 71000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三个逗号前为billion(
3、十亿)。英语中无英语中无“万万”这个词,我们可以用这个词,我们可以用“几十个千(几十个千(thousandthousand)”表示几万,表示几万,“几百个千(几百个千(thousandthousand)”表示表示“几十万几十万”。2,510two thousand five hundred and ten84,296eighty-four thousand two hundred and ninety-six 274,350 88,065,909two hundred and seventy-four thousand three hundred and fiftyeighty-eight m
4、illion sixty-five thousand nine hundred and nine8hundred,thousand,million用复数形式修饰名词时要用“of复数名词”。数以百 计的年轻人 hundreds of young people;数以千计的书 thousands of books注意:hundreds of thousands ofmillions of 复数词,其前面不能加具体的数词,但可加several或 many。9基数词单数名词形容词构成合成形容词。一个五岁的男孩 a five-year-old boy;一座七层高的建筑物 a 7-storey-high b
5、uilding.序数词序数词 1基数词变序数词基数词变序数词可利用口诀巧记:可利用口诀巧记:一、二、三,特殊记,八去“t”,九去“e”,“ve”要用“f”替,见“y”变成“i”和“e”,词尾加上“th”,若是遇到几十若是遇到几十 几,只变个位就可以几,只变个位就可以.first second third eight eighth nine ninth five fifth twelve twelfth twenty twentieth forty fortieth,twenty-five twenty-fifth 2其余情况均在基数词后加其余情况均在基数词后加 th。sixsixth,nine
6、teennineteenth,hundred hundredth,thousandthousandth 数词的应用数词的应用 1钟点的表示钟点的表示:小时、点钟、分钟、秒钟要用基数词。“几点钟几点钟”用基数词加用基数词加oclockoclock。oclockoclock可省略。可省略。现在是5点钟Its five(oclock)“几点过几分,几点过几分,3030分钟分钟”用介词用介词pastpast。7:05five past seven;7:15fifteen(a quarter)past seven;7:30half past seven “差几分几点差几分几点”用介词用介词“to”to”
7、。注意:整点加“1”且用 60减去目前的分钟数。7:40twenty to eight;7:45fifteen(a quarter)to eight 日常生活中的时间读法常常简化,直接按基数词的顺序日常生活中的时间读法常常简化,直接按基数词的顺序 读。读。7:05seven o five;7:15 seven fifteen 2编号的表示编号的表示:Lesson One the first lesson 第一课;Bus No3the No3bus 3路公共汽车;302房间Room 302(读作:room three o two);Page 457 第457页;电话号码,用基数词,可单个读,重复
8、的数字也可读 “double”,3855633three eight five five(double five)six three three(double three)。3年月日的表示年月日的表示:年份用基数词,先读前两位,再读后两位。1999nineteen ninety-nine;1900nineteen hundred;2000two thousand;1905nineteen o five 年用基数词,日用序数词 1998年6月8日写作:June 8,1998;读作:June the eighth,nineteen ninety-eight 或the eighth of June,
9、nineteen ninety-eight 特殊用法 1数词作主语,谓语动词用单数。Two months is quite a long time Four and two is six Whats two and three?2一个半小时(一年半,一个半月可类推)onean hour and a half。Thats all.Thank you!基数词的写法与读法基数词的写法与读法序数词的构成一、二、三特别记,th从四以上记。怎么加很容易,八减t,九减e。f来把ve替,见y变ie。若是遇到几十几,变换个位就可以。序数词的缩写形式1st2nd3rd4th分子表示法表示“年代”表示“某人x十多岁”小知识:+-x =另一些小知识Thats all.Thank you!-Where is the teachers office?-Its on the third floor.